Improvement in blind-fastening binges



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'JOHN H. Nevins, or .BnooKLYN, E, D., NEW YORK, AssIcNoR To WIL- LIAM A. BOSMAN, OF SAME PLAGF.

LettersPatent No. 106,272, dated .August 9, 18`7`0.

The Schedule referred to in these. Letters Patent pd making part of the sme.

-I, JOHN H. NEvN-s, of Brooklyn, E. D., in the 4county of Kings and State of New York, have invented certain Improvements in Look-Hinges 4for Blinds and other uses.

Nature and ,Object of my Invention. The 'object is to secure means whereby blinds, doors, &c., maybe he'ld stationary, both at, and at given points between, the extremes of their positions in practical use.

When shut, and when wide open, various means are now used for holding them in such positions more or less firmly. y j The intention or object of my invention is to provide one system of fastening suited to both these positions, and to any given positions between them,

to be operated from the inneil side' of the blind or.

door.

Themeans made use of' to eect this result are a corrugated orgrooved stud with a spring bolt ot' shape corresponding to the grooves, shooting into the same, or removed therefrom by the motion of an arm or finger-piece, providedwith a cam.

This corrugation or groove, in the stud or pintle,

and the corresponding or thereto-fitting end of the..

bolt has a peculiar shape and character.

A number'of slots would cut the stud or pintle almost eptirely away;` the use, however, of perpendicular grooves or con'u'gations, does not materially aeet the strength ofthe stud The sides of the grooves in this case are so out as to lie nearly at an angle of fortyLve degrees with the bolt b, audits line of movement, when the bolt is in that particular groove.

The end ofthe bolt has a 'these grooves closely. Y The pressure ofthe blind, actuated by the wind,

shape necessary to t \or by a hand, will be, as near as may be, in line with the bolt.

This is the line of greatest strength, and a line at right angles thereto would be that ofthe least strength of the bolt.

Through this line of the greatest strength, alternately or -at will, the force used is communicated to the cam and groove.' f

Description 0f the'dccompanying Drawing.

4Figure n1 is a transverse,sectional view, showing the position of the parts whei the blinds are open.

Figure 2 is au elevation showing the corrugated or grooved stud.

Figure 3 is an under or back-side elevation of the linger-piece with its cam..- l

ySe long as', the pressure of th-e cam C is continued, the pointed end ofthe bolt b is held lirmly into the groove g, thus locking the blind and' preventing motion in either direction.

The-never the pressure of the cam is released, the spring Sp. operates and withdraws the bolt from the groove g, unlocking -the blind and permitting free mo'- t-ion thereof. y

The number of' positions and the varying angles of' these positions of' the blindsl lwill depend upon the numbers, size, dnd positions of the grooves in the stud S, which may be varied to suit; and whatever these maybe in any given case, the blind 'may be held in place, not subject to the control of the wind, and in some cases presenting obstacles to burglarous intentions. A

In the drawing, that part of the hinge which is attached to the blind is crooked,as also the bolt b, to permit the blind, when shut, to come-duly into place.

This may be made in the ordinary form andthe lbolt straight, by making a corresponding change in. .the

part of the hinge screwed to the window-trame, thus bringing the stud over tothe line of'the jamb, but the method illustrated is preferred.

Claims. I claim as my invention- 1. lThe-pintle of a hinge provided with grooves or corrugatons having inclined sides Iitting the end of the locking-bolt, whereby the force used is distributed in line with the bolt.

2. The combination of the cam C, spring bolt b, and corrugated stud S, for the puipose-named.

JOHN Hi. NEVIN S.

vWitnesses:

J AMES T. TAYLOR, ADAM P. RUG.V 

